Analysis of Abnormal Defects of High Resistance of 1000 kV UHV Transmission Line

The oil chromatographic data of the high-voltage reactor in an UHV substation was abnormal, and subsequent live detection measures were taken for this defect, including high-frequency partial discharge test, UHF partial discharge test, ultrasonic partial discharge test, and vibration monitoring. This paper comprehensively analyzed the test data, judges that there was discharge inside, and basically judged the discharge position in the Y-pillar area of the high-voltage reactor, and put forward suggestions and opinions for subsequent disposal measures and operation and maintenance measures.